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VectorRendererSpec.cpp
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4459 lines (3751 loc) · 134 KB
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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "common/util.h"
#include "common/system.h"
#include "common/frac.h"
#include "graphics/managed_surface.h"
#include "graphics/nine_patch.h"
#include "gui/ThemeEngine.h"
#include "graphics/VectorRenderer.h"
#include "graphics/VectorRendererSpec.h"
#define VECTOR_RENDERER_FAST_TRIANGLES
/** Fixed point SQUARE ROOT **/
inline frac_t fp_sqroot(uint32 x) {
#if 0
// Use the FPU to compute the square root and then convert it to fixed
// point data. On systems with a fast FPU, this can be a lot faster than
// the integer based code below - on my system roughly 50x! However, on
// systems without an FPU, the converse might be true.
// For now, we only use the integer based code.
return doubleToFrac(sqrt((double)x));
#else
// The code below wants to use a lot of registers, which is not good on
// x86 processors. By taking advantage of the fact the input value is
// an integer, it might be possible to improve this. Furthermore, we could
// take advantage of the fact that we call this function several times on
// decreasing values. By feeding it the sqrt of the previous old x, as well
// as the old x, it should be possible to compute the correct sqrt with far
// fewer than 23 iterations.
uint32 root, remHI, remLO, testDIV, count;
root = 0;
remHI = 0;
remLO = x << 16;
count = 23;
do {
remHI = (remHI << 2) | (remLO >> 30);
remLO <<= 2;
root <<= 1;
testDIV = (root << 1) + 1;
if (remHI >= testDIV) {
remHI -= testDIV;
root++;
}
} while (count--);
return root;
#endif
}
/*
HELPER MACROS for Bresenham's circle drawing algorithm
Note the proper spelling on this header.
*/
#define BE_ALGORITHM() do { \
if (f >= 0) { \
y--; \
ddF_y += 2; \
f += ddF_y; \
py -= pitch; \
} \
px += pitch; \
ddF_x += 2; \
f += ddF_x + 1; \
} while(0)
#define BE_DRAWCIRCLE_TOP(ptr1,ptr2,x,y,px,py) do { \
*(ptr1 + (y) - (px)) = color; \
*(ptr1 + (x) - (py)) = color; \
*(ptr2 - (x) - (py)) = color; \
*(ptr2 - (y) - (px)) = color; \
} while (0)
#define BE_DRAWCIRCLE_BOTTOM(ptr3,ptr4,x,y,px,py) do { \
*(ptr3 - (y) + (px)) = color; \
*(ptr3 - (x) + (py)) = color; \
*(ptr4 + (x) + (py)) = color; \
*(ptr4 + (y) + (px)) = color; \
} while (0)
#define BE_DRAWCIRCLE(ptr1,ptr2,ptr3,ptr4,x,y,px,py) do { \
BE_DRAWCIRCLE_TOP(ptr1,ptr2,x,y,px,py); \
BE_DRAWCIRCLE_BOTTOM(ptr3,ptr4,x,y,px,py); \
} while (0)
#define BE_DRAWCIRCLE_TOP_CLIP(ptr1,ptr2,x,y,px,py,realX1,realY1,realX2,realY2) do { \
if (IS_IN_CLIP((realX1) + (y), (realY1) - (x))) \
*(ptr1 + (y) - (px)) = color; \
if (IS_IN_CLIP((realX1) + (x), (realY1) - (y))) \
*(ptr1 + (x) - (py)) = color; \
if (IS_IN_CLIP((realX2) - (x), (realY2) - (y))) \
*(ptr2 - (x) - (py)) = color; \
if (IS_IN_CLIP((realX2) - (y), (realY2) - (x))) \
*(ptr2 - (y) - (px)) = color; \
} while (0)
#define BE_DRAWCIRCLE_BOTTOM_CLIP(ptr3,ptr4,x,y,px,py,realX3,realY3,realX4,realY4) do { \
if (IS_IN_CLIP((realX3) - (y), (realY3) + (x))) \
*(ptr3 - (y) + (px)) = color; \
if (IS_IN_CLIP((realX3) - (x), (realY3) + (y))) \
*(ptr3 - (x) + (py)) = color; \
if (IS_IN_CLIP((realX4) + (x), (realY4) + (y))) \
*(ptr4 + (x) + (py)) = color; \
if (IS_IN_CLIP((realX4) + (y), (realY4) + (x))) \
*(ptr4 + (y) + (px)) = color; \
} while (0)
#define BE_DRAWCIRCLE_CLIP(ptr1,ptr2,ptr3,ptr4,x,y,px,py,realX1,realY1,realX2,realY2,realX3,realY3,realX4,realY4) do { \
BE_DRAWCIRCLE_TOP_CLIP(ptr1,ptr2,x,y,px,py,realX1,realY1,realX2,realY2); \
BE_DRAWCIRCLE_BOTTOM_CLIP(ptr3,ptr4,x,y,px,py,realX3,realY3,realX4,realY4); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR(ptr1,ptr2,ptr3,ptr4,x,y,px,py) do { \
*(ptr1 + (y) - (px)) = color1; \
*(ptr1 + (x) - (py)) = color1; \
*(ptr2 - (x) - (py)) = color1; \
*(ptr2 - (y) - (px)) = color1; \
*(ptr3 - (y) + (px)) = color1; \
*(ptr3 - (x) + (py)) = color1; \
*(ptr4 + (x) + (py)) = color2; \
*(ptr4 + (y) + (px)) = color2; \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_CLIP(ptr1,ptr2,ptr3,ptr4,x,y,px,py,realX1,realY1,realX2,realY2,realX3,realY3,realX4,realY4) do { \
if (IS_IN_CLIP((realX1) + (y), (realY1) - (x))) \
*(ptr1 + (y) - (px)) = color1; \
if (IS_IN_CLIP((realX1) + (x), (realY1) - (y))) \
*(ptr1 + (x) - (py)) = color1; \
if (IS_IN_CLIP((realX2) - (x), (realY2) - (y))) \
*(ptr2 - (x) - (py)) = color1; \
if (IS_IN_CLIP((realX2) - (y), (realY2) - (x))) \
*(ptr2 - (y) - (px)) = color1; \
if (IS_IN_CLIP((realX3) - (y), (realY3) + (x))) \
*(ptr3 - (y) + (px)) = color1; \
if (IS_IN_CLIP((realX3) - (x), (realY3) + (y))) \
*(ptr3 - (x) + (py)) = color1; \
if (IS_IN_CLIP((realX4) + (x), (realY4) + (y))) \
*(ptr4 + (x) + (py)) = color2; \
if (IS_IN_CLIP((realX4) + (y), (realY4) + (x))) \
*(ptr4 + (y) + (px)) = color2; \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_TR_CW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr + (y) - (px), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_TR_CCW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr + (x) - (py), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_TR_CW_CLIP(ptr,x,y,px,py,a,realX,realY) do { \
if (IS_IN_CLIP((realX) + (y), (realY) - (x))) \
this->blendPixelPtr(ptr + (y) - (px), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_TR_CCW_CLIP(ptr,x,y,px,py,a,realX,realY) do { \
if (IS_IN_CLIP((realX) + (x), (realY) - (y))) \
this->blendPixelPtr(ptr + (x) - (py), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_TL_CW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr - (x) - (py), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_TL_CCW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr - (y) - (px), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_TL_CW_CLIP(ptr,x,y,px,py,a,realX,realY) do { \
if (IS_IN_CLIP((realX) - (x), (realY) - (y))) \
this->blendPixelPtr(ptr - (x) - (py), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_TL_CCW_CLIP(ptr,x,y,px,py,a,realX,realY) do { \
if (IS_IN_CLIP((realX) - (y), (realY) - (x))) \
this->blendPixelPtr(ptr - (y) - (px), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_BL_CW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr - (y) + (px), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_BL_CCW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr - (x) + (py), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_BL_CW_CLIP(ptr,x,y,px,py,a,realX,realY) do { \
if (IS_IN_CLIP((realX) - (y), (realY) + (x))) \
this->blendPixelPtr(ptr - (y) + (px), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_BL_CCW_CLIP(ptr,x,y,px,py,a,realX,realY) do { \
if (IS_IN_CLIP((realX) - (x), (realY) + (y))) \
this->blendPixelPtr(ptr - (x) + (py), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_BR_CW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr + (x) + (py), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_BR_CCW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr + (y) + (px), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_BR_CW_CLIP(ptr,x,y,px,py,a,realX,realY) do { \
if (IS_IN_CLIP((realX) + (x), (realY) + (y))) \
this->blendPixelPtr(ptr + (x) + (py), color, a); \
} while (0)
#define BE_DRAWCIRCLE_BCOLOR_BR_CCW_CLIP(ptr,x,y,px,py,a,realX,realY) do { \
if (IS_IN_CLIP((realX) + (y), (realY) + (x))) \
this->blendPixelPtr(ptr + (y) + (px), color, a); \
} while (0)
#define BE_DRAWCIRCLE_XCOLOR_TOP(ptr1,ptr2,x,y,px,py) do { \
*(ptr1 + (y) - (px)) = color1; \
*(ptr1 + (x) - (py)) = color2; \
*(ptr2 - (x) - (py)) = color2; \
*(ptr2 - (y) - (px)) = color1; \
} while (0)
#define BE_DRAWCIRCLE_XCOLOR_BOTTOM(ptr3,ptr4,x,y,px,py) do { \
*(ptr3 - (y) + (px)) = color3; \
*(ptr3 - (x) + (py)) = color4; \
*(ptr4 + (x) + (py)) = color4; \
*(ptr4 + (y) + (px)) = color3; \
} while (0)
#define BE_DRAWCIRCLE_XCOLOR(ptr1,ptr2,ptr3,ptr4,x,y,px,py) do { \
BE_DRAWCIRCLE_XCOLOR_TOP(ptr1,ptr2,x,y,px,py); \
BE_DRAWCIRCLE_XCOLOR_BOTTOM(ptr3,ptr4,x,y,px,py); \
} while (0)
#define IS_IN_CLIP(x,y) (_clippingArea.left <= (x) && (x) < _clippingArea.right \
&& _clippingArea.top <= (y) && (y) < _clippingArea.bottom)
#define BE_DRAWCIRCLE_XCOLOR_TOP_CLIP(ptr1,ptr2,x,y,px,py,realX1,realY1,realX2,realY2) do { \
if (IS_IN_CLIP((realX1) + (y), (realY1) - (x))) \
*(ptr1 + (y) - (px)) = color1; \
\
if (IS_IN_CLIP((realX1) + (x), (realY1) - (y))) \
*(ptr1 + (x) - (py)) = color2; \
\
if (IS_IN_CLIP((realX2) - (x), (realY2) - (y))) \
*(ptr2 - (x) - (py)) = color2; \
\
if (IS_IN_CLIP((realX2) - (y), (realY2) - (x))) \
*(ptr2 - (y) - (px)) = color1; \
} while (0)
#define BE_DRAWCIRCLE_XCOLOR_BOTTOM_CLIP(ptr3,ptr4,x,y,px,py,realX3,realY3,realX4,realY4) do { \
if (IS_IN_CLIP((realX3) - (y), (realY3) + (x))) \
*(ptr3 - (y) + (px)) = color3; \
\
if (IS_IN_CLIP((realX3) - (x), (realY3) + (y))) \
*(ptr3 - (x) + (py)) = color4; \
\
if (IS_IN_CLIP((realX4) + (x), (realY4) + (y))) \
*(ptr4 + (x) + (py)) = color4; \
\
if (IS_IN_CLIP((realX4) + (y), (realY4) + (x))) \
*(ptr4 + (y) + (px)) = color3; \
} while (0)
#define BE_DRAWCIRCLE_XCOLOR_CLIP(ptr1,ptr2,ptr3,ptr4,x,y,px,py,realX1,realY1,realX2,realY2,realX3,realY3,realX4,realY4) do { \
BE_DRAWCIRCLE_XCOLOR_TOP_CLIP(ptr1,ptr2,x,y,px,py,realX1,realY1,realX2,realY2); \
BE_DRAWCIRCLE_XCOLOR_BOTTOM_CLIP(ptr3,ptr4,x,y,px,py,realX3,realY3,realX4,realY4); \
} while (0)
#define BE_RESET() do { \
f = 1 - r; \
ddF_x = 0; ddF_y = -2 * r; \
x = 0; y = r; px = 0; py = pitch * r; \
} while (0)
#define TRIANGLE_MAINX() \
if (error_term >= 0) { \
ptr_right += pitch; \
ptr_left += pitch; \
error_term += dysub; \
} else { \
error_term += ddy; \
} \
ptr_right++; \
ptr_left--;
#define TRIANGLE_MAINY() \
if (error_term >= 0) { \
ptr_right++; \
ptr_left--; \
error_term += dxsub; \
} else { \
error_term += ddx; \
} \
ptr_right += pitch; \
ptr_left += pitch;
/** HELPER MACROS for WU's circle drawing algorithm **/
#define WU_DRAWCIRCLE_TOP(ptr1,ptr2,x,y,px,py,a) do { \
this->blendPixelPtr(ptr1 + (y) - (px), color, a); \
this->blendPixelPtr(ptr1 + (x) - (py), color, a); \
this->blendPixelPtr(ptr2 - (x) - (py), color, a); \
this->blendPixelPtr(ptr2 - (y) - (px), color, a); \
} while (0)
#define WU_DRAWCIRCLE_BOTTOM(ptr3,ptr4,x,y,px,py,a) do { \
this->blendPixelPtr(ptr3 - (y) + (px), color, a); \
this->blendPixelPtr(ptr3 - (x) + (py), color, a); \
this->blendPixelPtr(ptr4 + (x) + (py), color, a); \
this->blendPixelPtr(ptr4 + (y) + (px), color, a); \
} while (0)
#define WU_DRAWCIRCLE(ptr1,ptr2,ptr3,ptr4,x,y,px,py,a) do { \
WU_DRAWCIRCLE_TOP(ptr1,ptr2,x,y,px,py,a); \
WU_DRAWCIRCLE_BOTTOM(ptr3,ptr4,x,y,px,py,a); \
} while (0)
// Color depending on y
// Note: this is only for the outer pixels
#define WU_DRAWCIRCLE_XCOLOR_TOP(ptr1,ptr2,x,y,px,py,a,func) do { \
this->func(ptr1 + (y) - (px), color1, a); \
this->func(ptr1 + (x) - (py), color2, a); \
this->func(ptr2 - (x) - (py), color2, a); \
this->func(ptr2 - (y) - (px), color1, a); \
} while (0)
#define WU_DRAWCIRCLE_XCOLOR_BOTTOM(ptr3,ptr4,x,y,px,py,a,func) do { \
this->func(ptr3 - (y) + (px), color3, a); \
this->func(ptr3 - (x) + (py), color4, a); \
this->func(ptr4 + (x) + (py), color4, a); \
this->func(ptr4 + (y) + (px), color3, a); \
} while (0)
#define WU_DRAWCIRCLE_XCOLOR(ptr1,ptr2,ptr3,ptr4,x,y,px,py,a,func) do { \
WU_DRAWCIRCLE_XCOLOR_TOP(ptr1,ptr2,x,y,px,py,a,func); \
WU_DRAWCIRCLE_XCOLOR_BOTTOM(ptr3,ptr4,x,y,px,py,a,func); \
} while (0)
// Color depending on corner (tl,tr,bl: color1, br: color2)
// Note: this is only for the outer pixels
#define WU_DRAWCIRCLE_BCOLOR(ptr1,ptr2,ptr3,ptr4,x,y,px,py,a) do { \
this->blendPixelPtr(ptr1 + (y) - (px), color1, a); \
this->blendPixelPtr(ptr1 + (x) - (py), color1, a); \
this->blendPixelPtr(ptr2 - (x) - (py), color1, a); \
this->blendPixelPtr(ptr2 - (y) - (px), color1, a); \
this->blendPixelPtr(ptr3 - (y) + (px), color1, a); \
this->blendPixelPtr(ptr3 - (x) + (py), color1, a); \
this->blendPixelPtr(ptr4 + (x) + (py), color2, a); \
this->blendPixelPtr(ptr4 + (y) + (px), color2, a); \
} while (0)
#define WU_DRAWCIRCLE_BCOLOR_TR_CW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr + (y) - (px), color, a); \
} while (0)
#define WU_DRAWCIRCLE_BCOLOR_TR_CCW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr + (x) - (py), color, a); \
} while (0)
#define WU_DRAWCIRCLE_BCOLOR_TL_CW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr - (x) - (py), color, a); \
} while (0)
#define WU_DRAWCIRCLE_BCOLOR_TL_CCW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr - (y) - (px), color, a); \
} while (0)
#define WU_DRAWCIRCLE_BCOLOR_BL_CW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr - (y) + (px), color, a); \
} while (0)
#define WU_DRAWCIRCLE_BCOLOR_BL_CCW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr - (x) + (py), color, a); \
} while (0)
#define WU_DRAWCIRCLE_BCOLOR_BR_CW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr + (x) + (py), color, a); \
} while (0)
#define WU_DRAWCIRCLE_BCOLOR_BR_CCW(ptr,x,y,px,py,a) do { \
this->blendPixelPtr(ptr + (y) + (px), color, a); \
} while (0)
// optimized Wu's algorithm
#define WU_ALGORITHM() do { \
oldT = T; \
T = fp_sqroot(rsq - y*y) ^ 0xFFFF; \
py += pitch; \
if (T < oldT) { \
x--; px -= pitch; \
} \
a2 = (T >> 8); \
a1 = ~a2; \
} while (0)
namespace Graphics {
/**
* Fills several pixels in a row with a given color.
*
* @param first Pointer to the first pixel to fill.
* @param last Pointer to the last pixel to fill.
* @param color Color of the pixel
*/
template<typename PixelType>
void colorFill(PixelType *first, PixelType *last, PixelType color) {
static_assert(sizeof(PixelType) == 1 || sizeof(PixelType) == 2 || sizeof(PixelType) == 4, "Unsupported PixelType");
int count = (last - first);
if (sizeof(PixelType) == 1)
memset((uint8 *)first, color, count);
else if (sizeof(PixelType) == 2)
Common::memset16((uint16 *)first, color, count);
else
Common::memset32((uint32 *)first, color, count);
}
template<typename PixelType>
void colorFillClip(PixelType *first, PixelType *last, PixelType color, int realX, int realY, Common::Rect &clippingArea) {
static_assert(sizeof(PixelType) == 1 || sizeof(PixelType) == 2 || sizeof(PixelType) == 4, "Unsupported PixelType");
if (realY < clippingArea.top || realY >= clippingArea.bottom)
return;
int count = (last - first);
if (realX > clippingArea.right || realX + count < clippingArea.left)
return;
if (realX < clippingArea.left) {
int diff = (clippingArea.left - realX);
realX += diff;
first += diff;
count -= diff;
}
if (clippingArea.right <= realX + count) {
int diff = (realX + count - clippingArea.right);
count -= diff;
}
if (sizeof(PixelType) == 1)
memset((uint8 *)first, color, count);
else if (sizeof(PixelType) == 2)
Common::memset16((uint16 *)first, color, count);
else
Common::memset32((uint32 *)first, color, count);
}
/**
* Fills several pixels in a column with a given color.
*
* @param first Pointer to the first pixel to fill.
* @param last Pointer to the last pixel to fill.
* @param pitch Number of pixels in a line.
* @param color Color of the pixel
*/
template<typename PixelType>
void colorVFill(PixelType *first, PixelType *last, int pitch, PixelType color) {
int count = (last - first) / pitch;
if (!count)
return;
for (PixelType *p = first; count; p+= pitch, count--) {
*p = color;
}
}
template<typename PixelType>
void colorVFillClip(PixelType *first, PixelType *last, int pitch, PixelType color, int realX, int realY, Common::Rect &clippingArea) {
if (realX < clippingArea.left || realX >= clippingArea.right)
return;
int count = (last - first) / pitch;
if (realY > clippingArea.bottom || realY + count < clippingArea.top)
return;
if (realY < clippingArea.top) {
int diff = (clippingArea.top - realY);
realY += diff;
first += diff * pitch;
count -= diff;
}
if (clippingArea.bottom <= realY + count) {
int diff = (realY + count - clippingArea.bottom);
count -= diff;
}
if (!count)
return;
for (PixelType *p = first; count; p+= pitch, count--) {
*p = color;
}
}
VectorRenderer *createRenderer(int mode) {
#ifdef DISABLE_FANCY_THEMES
assert(mode == GUI::ThemeEngine::kGfxStandard);
#endif
PixelFormat format = g_system->getOverlayFormat();
switch (mode) {
case GUI::ThemeEngine::kGfxStandard:
if (g_system->getOverlayFormat().bytesPerPixel == 4)
return new VectorRendererSpec<uint32>(format);
else if (g_system->getOverlayFormat().bytesPerPixel == 2)
return new VectorRendererSpec<uint16>(format);
else if (g_system->getOverlayFormat().bytesPerPixel == 1)
return new VectorRendererSpec<uint8>(format);
break;
#ifndef DISABLE_FANCY_THEMES
case GUI::ThemeEngine::kGfxAntialias:
if (g_system->getOverlayFormat().bytesPerPixel == 4)
return new VectorRendererAA<uint32>(format);
else if (g_system->getOverlayFormat().bytesPerPixel == 2)
return new VectorRendererAA<uint16>(format);
// No AA with 8-bit
else if (g_system->getOverlayFormat().bytesPerPixel == 1)
return new VectorRendererSpec<uint8>(format);
break;
#endif
default:
break;
}
return 0;
}
template<typename PixelType>
VectorRendererSpec<PixelType>::
VectorRendererSpec(PixelFormat format) :
_format(format),
_redMask((0xFF >> format.rLoss) << format.rShift),
_greenMask((0xFF >> format.gLoss) << format.gShift),
_blueMask((0xFF >> format.bLoss) << format.bShift),
_alphaMask((0xFF >> format.aLoss) << format.aShift) {
_clippingArea = Common::Rect(0, 0, 32767, 32767);
_fgColor = _bgColor = _bevelColor = 0;
_gradientStart = _gradientEnd = 0;
}
/****************************
* Gradient-related methods *
****************************/
template<typename PixelType>
void VectorRendererSpec<PixelType>::
setGradientColors(uint8 r1, uint8 g1, uint8 b1, uint8 r2, uint8 g2, uint8 b2) {
_gradientEnd = _format.RGBToColor(r2, g2, b2);
_gradientStart = _format.RGBToColor(r1, g1, b1);
if (sizeof(PixelType) == 4) {
_gradientBytes[0] = ((_gradientEnd & _redMask) >> _format.rShift) - ((_gradientStart & _redMask) >> _format.rShift);
_gradientBytes[1] = ((_gradientEnd & _greenMask) >> _format.gShift) - ((_gradientStart & _greenMask) >> _format.gShift);
_gradientBytes[2] = ((_gradientEnd & _blueMask) >> _format.bShift) - ((_gradientStart & _blueMask) >> _format.bShift);
} else {
_gradientBytes[0] = (_gradientEnd & _redMask) - (_gradientStart & _redMask);
_gradientBytes[1] = (_gradientEnd & _greenMask) - (_gradientStart & _greenMask);
_gradientBytes[2] = (_gradientEnd & _blueMask) - (_gradientStart & _blueMask);
}
}
template<typename PixelType>
inline PixelType VectorRendererSpec<PixelType>::
calcGradient(uint32 pos, uint32 max) {
PixelType output = 0;
pos = (MIN(pos * Base::_gradientFactor, max) << 12) / max;
if (sizeof(PixelType) == 4) {
output |= ((_gradientStart & _redMask) + (((_gradientBytes[0] * pos) >> 12) << _format.rShift)) & _redMask;
output |= ((_gradientStart & _greenMask) + (((_gradientBytes[1] * pos) >> 12) << _format.gShift)) & _greenMask;
output |= ((_gradientStart & _blueMask) + (((_gradientBytes[2] * pos) >> 12) << _format.bShift)) & _blueMask;
} else {
output |= ((_gradientStart & _redMask) + ((_gradientBytes[0] * pos) >> 12)) & _redMask;
output |= ((_gradientStart & _greenMask) + ((_gradientBytes[1] * pos) >> 12)) & _greenMask;
output |= ((_gradientStart & _blueMask) + ((_gradientBytes[2] * pos) >> 12)) & _blueMask;
}
output |= _alphaMask;
return output;
}
template<typename PixelType>
void VectorRendererSpec<PixelType>::
precalcGradient(int h) {
PixelType prevcolor = 0, color;
_gradCache.resize(0);
_gradIndexes.resize(0);
for (int i = 0; i < h + 2; i++) {
color = calcGradient(i, h);
if (color != prevcolor || i == 0 || i > h - 1) {
prevcolor = color;
_gradCache.push_back(color);
_gradIndexes.push_back(i);
}
}
}
template<typename PixelType>
void VectorRendererSpec<PixelType>::
gradientFill(PixelType *ptr, int width, int x, int y) {
bool ox = ((y & 1) == 1);
int curGrad = 0;
while (_gradIndexes[curGrad + 1] <= y)
curGrad++;
// precalcGradient assures that _gradIndexes entries always differ in
// their value. This assures stripSize is always different from zero.
int stripSize = _gradIndexes[curGrad + 1] - _gradIndexes[curGrad];
int grad = (((y - _gradIndexes[curGrad]) % stripSize) << 2) / stripSize;
// Dithering:
// +--+ +--+ +--+ +--+
// | | | | | *| | *|
// | | | *| |* | |**|
// +--+ +--+ +--+ +--+
// 0 1 2 3
if (grad == 0 ||
_gradCache[curGrad] == _gradCache[curGrad + 1] || // no color change
stripSize < 2) { // the stip is small
colorFill<PixelType>(ptr, ptr + width, _gradCache[curGrad]);
} else if (grad == 3 && ox) {
colorFill<PixelType>(ptr, ptr + width, _gradCache[curGrad + 1]);
} else {
for (int j = x; j < x + width; j++, ptr++) {
bool oy = ((j & 1) == 1);
if ((ox && oy) ||
((grad == 2 || grad == 3) && ox && !oy) ||
(grad == 3 && oy))
*ptr = _gradCache[curGrad + 1];
else
*ptr = _gradCache[curGrad];
}
}
}
template<typename PixelType>
void VectorRendererSpec<PixelType>::
gradientFillClip(PixelType *ptr, int width, int x, int y, int realX, int realY) {
if (realY < _clippingArea.top || realY >= _clippingArea.bottom) return;
bool ox = ((y & 1) == 1);
int curGrad = 0;
while (_gradIndexes[curGrad + 1] <= y)
curGrad++;
// precalcGradient assures that _gradIndexes entries always differ in
// their value. This assures stripSize is always different from zero.
int stripSize = _gradIndexes[curGrad + 1] - _gradIndexes[curGrad];
int grad = (((y - _gradIndexes[curGrad]) % stripSize) << 2) / stripSize;
// Dithering:
// +--+ +--+ +--+ +--+
// | | | | | *| | *|
// | | | *| |* | |**|
// +--+ +--+ +--+ +--+
// 0 1 2 3
if (grad == 0 ||
_gradCache[curGrad] == _gradCache[curGrad + 1] || // no color change
stripSize < 2) { // the stip is small
colorFillClip<PixelType>(ptr, ptr + width, _gradCache[curGrad], realX, realY, _clippingArea);
} else if (grad == 3 && ox) {
colorFillClip<PixelType>(ptr, ptr + width, _gradCache[curGrad + 1], realX, realY, _clippingArea);
} else {
for (int j = x; j < x + width; j++, ptr++) {
if (realX + j - x < _clippingArea.left || realX + j - x >= _clippingArea.right) continue;
bool oy = ((j & 1) == 1);
if ((ox && oy) ||
((grad == 2 || grad == 3) && ox && !oy) ||
(grad == 3 && oy))
*ptr = _gradCache[curGrad + 1];
else
*ptr = _gradCache[curGrad];
}
}
}
template<typename PixelType>
void VectorRendererSpec<PixelType>::
fillSurface() {
Common::Rect drawRect(0, 0, _activeSurface->w, _activeSurface->h);
drawRect.clip(_clippingArea);
if (drawRect.isEmpty()) {
return;
}
int h = _activeSurface->h;
int pitch = _activeSurface->pitch / _activeSurface->format.bytesPerPixel;
PixelType *ptr = (PixelType *)_activeSurface->getBasePtr(0, drawRect.top);
if (Base::_fillMode == kFillBackground || Base::_fillMode == kFillForeground) {
PixelType color = (Base::_fillMode == kFillBackground ? _bgColor : _fgColor);
PixelType *ptrLeft = (ptr + drawRect.left), *ptrRight = ptr + drawRect.right;
for (int i = drawRect.top; i < drawRect.bottom; i++) {
colorFill<PixelType>(ptrLeft, ptrRight, color);
ptrLeft += pitch;
ptrRight += pitch;
}
} else if (Base::_fillMode == kFillGradient) {
precalcGradient(h);
for (int i = drawRect.top; i < drawRect.bottom; i++) {
gradientFill(ptr + drawRect.left, drawRect.width(), 0, i);
ptr += pitch;
}
}
}
template<typename PixelType>
void VectorRendererSpec<PixelType>::
copyFrame(OSystem *sys, const Common::Rect &r) {
sys->copyRectToOverlay(
_activeSurface->getBasePtr(r.left, r.top),
_activeSurface->pitch,
r.left, r.top, r.width(), r.height()
);
}
template<typename PixelType>
void VectorRendererSpec<PixelType>::
blitSurface(const Graphics::ManagedSurface *source, const Common::Rect &r) {
assert(source->w == _activeSurface->w && source->h == _activeSurface->h);
byte *dst_ptr = (byte *)_activeSurface->getBasePtr(r.left, r.top);
const byte *src_ptr = (const byte *)source->getBasePtr(r.left, r.top);
const int dst_pitch = _activeSurface->pitch;
const int src_pitch = source->pitch;
int h = r.height();
const int w = r.width() * sizeof(PixelType);
while (h--) {
memcpy(dst_ptr, src_ptr, w);
dst_ptr += dst_pitch;
src_ptr += src_pitch;
}
}
template<typename PixelType>
void VectorRendererSpec<PixelType>::
blitManagedSurface(const Graphics::ManagedSurface *source, const Common::Point &p, Graphics::AlphaType alphaType) {
Common::Rect drawRect(p.x, p.y, p.x + source->w, p.y + source->h);
drawRect.clip(_clippingArea);
drawRect.translate(-p.x, -p.y);
if (drawRect.isEmpty()) {
return;
}
Common::Point np;
if (!_clippingArea.contains(p)) {
int16 nx = CLIP(p.x, _clippingArea.left, _clippingArea.right);
int16 ny = CLIP(p.y, _clippingArea.top, _clippingArea.bottom);
np = Common::Point(nx, ny);
} else {
np = p;
}
if (alphaType != Graphics::ALPHA_OPAQUE) {
_activeSurface->transBlitFrom(*source, drawRect, np);
} else {
_activeSurface->simpleBlitFrom(*source, drawRect, np);
}
}
template<typename PixelType>
void VectorRendererSpec<PixelType>::
applyScreenShading(GUI::ThemeEngine::ShadingStyle shadingStyle) {
int pixels = _activeSurface->w * _activeSurface->h;
PixelType *ptr = (PixelType *)_activeSurface->getPixels();
uint8 r, g, b;
uint lum;
// Mask to clear the last bit of every color component and all unused bits
const uint32 colorMask = ~((1 << _format.rShift) | (1 << _format.gShift) | (1 << _format.bShift) // R/G/B components
| (_format.aLoss == 8 ? 0 : (1 << _format.aShift)) // Alpha component
| ~(_alphaMask | _redMask | _greenMask | _blueMask)); // All unused bits
if (shadingStyle == GUI::ThemeEngine::kShadingDim) {
// TODO: Check how this interacts with kFeatureOverlaySupportsAlpha
for (int i = 0; i < pixels; ++i) {
*ptr = ((*ptr & colorMask) >> 1) | _alphaMask;
++ptr;
}
} else if (shadingStyle == GUI::ThemeEngine::kShadingLuminance) {
while (pixels--) {
_format.colorToRGB(*ptr, r, g, b);
lum = (r >> 2) + (g >> 1) + (b >> 3);
*ptr++ = _format.RGBToColor(lum, lum, lum);
}
}
}
template<typename PixelType>
inline void VectorRendererSpec<PixelType>::
blendPixelPtr(PixelType *ptr, PixelType color, uint8 alpha) {
if (alpha == 0xff) {
// fully opaque pixel, don't blend
*ptr = color | _alphaMask;
} else if (sizeof(PixelType) == 4) {
const byte sR = (color & _redMask) >> _format.rShift;
const byte sG = (color & _greenMask) >> _format.gShift;
const byte sB = (color & _blueMask) >> _format.bShift;
byte dR = (*ptr & _redMask) >> _format.rShift;
byte dG = (*ptr & _greenMask) >> _format.gShift;
byte dB = (*ptr & _blueMask) >> _format.bShift;
byte dA = (*ptr & _alphaMask) >> _format.aShift;
dR += ((sR - dR) * alpha) >> 8;
dG += ((sG - dG) * alpha) >> 8;
dB += ((sB - dB) * alpha) >> 8;
dA += ((0xff - dA) * alpha) >> 8;
*ptr = ((dR << _format.rShift) & _redMask)
| ((dG << _format.gShift) & _greenMask)
| ((dB << _format.bShift) & _blueMask)
| ((dA << _format.aShift) & _alphaMask);
} else if (sizeof(PixelType) == 2) {
int idst = *ptr;
int isrc = color;
*ptr = (PixelType)(
(_redMask & ((idst & _redMask) +
((int)(((int)(isrc & _redMask) -
(int)(idst & _redMask)) * alpha) >> 8))) |
(_greenMask & ((idst & _greenMask) +
((int)(((int)(isrc & _greenMask) -
(int)(idst & _greenMask)) * alpha) >> 8))) |
(_blueMask & ((idst & _blueMask) +
((int)(((int)(isrc & _blueMask) -
(int)(idst & _blueMask)) * alpha) >> 8))) |
(_alphaMask & ((idst & _alphaMask) +
((int)(((int)(_alphaMask) -
(int)(idst & _alphaMask)) * alpha) >> 8))));
} else if (sizeof(PixelType) == 1) {
if (alpha & 0x80)
*ptr = color;
} else {
error("Unsupported BPP format: %u", (uint)sizeof(PixelType));
}
}
template<typename PixelType>
inline void VectorRendererSpec<PixelType>::
blendPixelPtrClip(PixelType *ptr, PixelType color, uint8 alpha, int x, int y) {
if (IS_IN_CLIP(x, y))
blendPixelPtr(ptr, color, alpha);
}
template<typename PixelType>
inline void VectorRendererSpec<PixelType>::
blendPixelDestAlphaPtr(PixelType *ptr, PixelType color, uint8 alpha) {
int idst = *ptr;
// This function is only used for corner pixels in rounded rectangles, so
// the performance hit of this if shouldn't be too high.
// We're also ignoring the cases where dst has intermediate alpha.
if ((idst & _alphaMask) == 0) {
// set color and alpha channels
*ptr = (PixelType)(color & (_redMask | _greenMask | _blueMask)) |
((alpha >> _format.aLoss) << _format.aShift);
} else {
// blend color with background
blendPixelPtr(ptr, color, alpha);
}
}
template<typename PixelType>
inline void VectorRendererSpec<PixelType>::
darkenFill(PixelType *ptr, PixelType *end) {
PixelType mask = (PixelType)((3 << _format.rShift) | (3 << _format.gShift) | (3 << _format.bShift));
if (!g_system->hasFeature(OSystem::kFeatureOverlaySupportsAlpha)) {
// !kFeatureOverlaySupportsAlpha (but might have alpha bits)
mask |= _alphaMask;
while (ptr != end) {
*ptr = ((*ptr & ~mask) >> 2) | _alphaMask;
++ptr;
}
} else {
// kFeatureOverlaySupportsAlpha
// assuming at least 3 alpha bits
mask |= 3 << _format.aShift;
PixelType addA = (PixelType)(3 << (_format.aShift + 6 - _format.aLoss));
while (ptr != end) {
// Darken the color, and increase the alpha
// (0% -> 75%, 100% -> 100%)
*ptr = (PixelType)(((*ptr & ~mask) >> 2) + addA);
++ptr;
}
}
}
template<typename PixelType>
inline void VectorRendererSpec<PixelType>::
darkenFillClip(PixelType *ptr, PixelType *end, int x, int y) {
PixelType mask = (PixelType)((3 << _format.rShift) | (3 << _format.gShift) | (3 << _format.bShift));
if (!g_system->hasFeature(OSystem::kFeatureOverlaySupportsAlpha)) {
// !kFeatureOverlaySupportsAlpha (but might have alpha bits)
mask |= _alphaMask;
while (ptr != end) {
if (IS_IN_CLIP(x, y)) *ptr = ((*ptr & ~mask) >> 2) | _alphaMask;
++ptr;
++x;
}
} else {
// kFeatureOverlaySupportsAlpha
// assuming at least 3 alpha bits
mask |= 3 << _format.aShift;
PixelType addA = (PixelType)(3 << (_format.aShift + 6 - _format.aLoss));
while (ptr != end) {
// Darken the color, and increase the alpha
// (0% -> 75%, 100% -> 100%)
if (IS_IN_CLIP(x, y)) *ptr = (PixelType)(((*ptr & ~mask) >> 2) + addA);
++ptr;
++x;
}
}
}
/********************************************************************
********************************************************************
* Primitive shapes drawing - Public API calls - VectorRendererSpec *
********************************************************************
********************************************************************/
template<typename PixelType>
void VectorRendererSpec<PixelType>::
drawString(const Graphics::Font *font, const Common::U32String &text, const Common::Rect &area,
Graphics::TextAlign alignH, GUI::ThemeEngine::TextAlignVertical alignV, int deltax, bool ellipsis, const Common::Rect &textDrawableArea) {
int offset = area.top;
if (font->getFontHeight() < area.height()) {
switch (alignV) {
case GUI::ThemeEngine::kTextAlignVCenter:
offset = area.top + ((area.height() - font->getFontHeight()) >> 1);
break;
case GUI::ThemeEngine::kTextAlignVBottom:
offset = area.bottom - font->getFontHeight();
break;
default:
break;